31171104 has 36 divisors (see below), whose sum is σ = 88643646. Its totient is φ = 10390272.

The previous prime is 31171103. The next prime is 31171121. The reversal of 31171104 is 40117113.

It can be written as a sum of positive squares in only one way, i.e., 23619600 + 7551504 = 4860^2 + 2748^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31171103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53829 + ... + 54404.

Almost surely, 2^31171104 is an apocalyptic number.

It is an amenable number.

31171104 is an abundant number, since it is smaller than the sum of its proper divisors (57472542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31171104 is a wasteful number, since it uses less digits than its factorization.

31171104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108249 (or 108238 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 31171104 is about 5583.1088114061. The cubic root of 31171104 is about 314.7149651356.

Adding to 31171104 its reverse (40117113), we get a palindrome (71288217).

The spelling of 31171104 in words is "thirty-one million, one hundred seventy-one thousand, one hundred four".